Bundler error

Gemfile

source 'https://rubygems.org'

gem 'berkshelf', '~> 1.4.0'
gem 'chef', '~> 10.26.0'
# gem 'json', '~> 1.7.7' # if I uncomment this everything works
gem 'knife-solo', '~> 0.3.0.pre3'
gem 'capistrano'
gem 'capistrano_colors'
gem 'capistrano-notify'

shell transcript

@mbp ➜  deps rvm:(ruby-1.9.3@bundler)  bundle --version
Bundler version 1.2.3
@mbp ➜  deps rvm:(ruby-1.9.3@bundler)  bundle install
Fetching gem metadata from https://rubygems.org/........
Fetching gem metadata from https://rubygems.org/..
Bundler could not find compatible versions for gem "json":
  In Gemfile:
    chef (~> 10.26.0) ruby depends on
      json (<= 1.7.7, >= 1.4.4) ruby

    berkshelf (~> 1.4.0) ruby depends on
      json (1.8.0)
@mbp ➜  deps rvm:(ruby-1.9.3@bundler)  rvm use @global
Using /Users/fabionapoleoni/.rvm/gems/ruby-1.9.3-p429 with gemset global
@mbp ➜  deps rvm:(ruby-1.9.3@global)  gem install bundler
Fetching: bundler-1.3.5.gem (100%)
Successfully installed bundler-1.3.5
1 gem installed
@mbp ➜  deps rvm:(ruby-1.9.3@global)  rvm use @bundler
Using /Users/fabionapoleoni/.rvm/gems/ruby-1.9.3-p429 with gemset bundler
@mbp ➜  deps rvm:(ruby-1.9.3@bundler)  bundle --version
Bundler version 1.3.5
@mbp ➜  deps rvm:(ruby-1.9.3@bundler)  bundle install
Fetching gem metadata from https://rubygems.org/........
Fetching gem metadata from https://rubygems.org/..
Resolving dependencies...
Bundler could not find compatible versions for gem "json":
  In Gemfile:
    chef (~> 10.26.0) ruby depends on
      json (<= 1.7.7, >= 1.4.4) ruby

    berkshelf (~> 1.4.0) ruby depends on
      json (1.8.0)